No encoding is needed, just replace the defective sensors.
Equals to this part numbers:
A0255453032, A0255454132, A0265450532, A0265450732, A0275457432,
A0275457532, A0285453832, A1661500179, A1661500279,
A1661500379, A1661500479

Glass sensors for A-class VDO unit, The sensors are made on a very thin glass substrate, and therefore need special carefully handling in order not to break!! For Mercedes A-class W168 VDO ECU / airflow meters (the sensor is used for an ECU with integrated airflow meter) .Glass sensors "are responsible for the malfunctioning of the air flow meter in Mercedes A-Class W168 The problem is most often expressed by the fact that it is problematic or impossible to start the engine, or the engine is running restlessly.A reason for this is the faulty functioning It is then necessary to replace them.

Suitable for these cars:
For Mercedes A-class W168 VDO